change email addresses in exchange 2010

Hi Experts,
we are using a cluster of exchange 2010.
Now each user has an own email address like: abc@email.de

We want to change this in the future for each user. Lets say each user is also reachable by another email like: surname.lastname@email.de

I know I can create a new email for each user and add it to his account.
But when we want to use the new structure with surname.lastname@email.de , is there a quick way to change it ?
Eprs_AdminSystem ArchitectAsked:
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SreRajCommented:
Hi,

You can create a new Email Address Policy from Organization Configuration -> Hub Transport, in the Email Address Policies tab in EMC. Since you want to assign the new mail address only to users, you can create a new policy. The default Email Address Policy applied to all recipient objects which includes groups, contacts and public folders.

Please refer the following article for more information.

http://exchangeserverpro.com/exchange-server-2010-email-address-policies/
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Eprs_AdminSystem ArchitectAuthor Commented:
Thanks for the very good explaination.

Just when I understand correctly, when I create a new policy with my settings, the users are still reachable by the old email addresses right ?
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SreRajCommented:
Yes, the new address will be added as Primary SMTP Address and old one will be retained as Secondary SMTP Address.
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Eprs_AdminSystem ArchitectAuthor Commented:
great, which prio I have to give the new once ?
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SreRajCommented:
If you are going to use the new one for both internal and external communications, then you can make it primary.
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Eprs_AdminSystem ArchitectAuthor Commented:
cool thanks, I will give it a try.
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Eprs_AdminSystem ArchitectAuthor Commented:
Hi,

I need help for Exchange 2007.
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